refactor: move DocFxForUnity.csproj into Documentation/

Simplifies setup: users only need to copy one folder (Documentation/)
instead of a folder plus a separate file at the project root.

- Add explicit Compile glob (../Assets/**/*.cs) since the SDK default
  no longer covers Assets/ from the new location
- Fix lib/UnityEngine fallback path to ../lib/UnityEngine
- Update docfx.json metadata src from ".." to "."
- Update README accordingly

https://claude.ai/code/session_017hjwp9DHW2Sh6ZNhMF2Lbs

Author: claude

DocFxForUnity.csproj Documentation/DocFxForUnity.csprojDocFxForUnity.csproj renamed to Documentation/DocFxForUnity.csproj

@@ -1,8 +1,13 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>netstandard2.1</TargetFramework>
+    <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Compile Include="../Assets/**/*.cs" />
+  </ItemGroup>
+
   <Target Name="AddUnityReferences" BeforeTargets="ResolveAssemblyReferences">
     <!--
       Priority 1: UNITY_MANAGED_PATH environment variable (explicit override).
@@ -14,7 +19,7 @@
     <!-- Priorities 1 & 2: explicit path -->
     <PropertyGroup>
       <UnityManagedPath Condition="'$(UNITY_MANAGED_PATH)' != ''">$(UNITY_MANAGED_PATH)</UnityManagedPath>
-      <UnityManagedPath Condition="'$(UnityManagedPath)' == '' and Exists('$(MSBuildProjectDirectory)/lib/UnityEngine')">$(MSBuildProjectDirectory)/lib/UnityEngine</UnityManagedPath>
+      <UnityManagedPath Condition="'$(UnityManagedPath)' == '' and Exists('$(MSBuildProjectDirectory)/../lib/UnityEngine')">$(MSBuildProjectDirectory)/../lib/UnityEngine</UnityManagedPath>
     </PropertyGroup>
 
     <!-- Collect DLLs from explicit path (priorities 1 or 2) -->

Documentation/docfx.json

@@ -3,7 +3,7 @@
         {
             "src": [
                 {
-                    "src": "..",
+                    "src": ".",
                     "files": [
                         "DocFxForUnity.csproj"
                     ]

README.md

@@ -20,19 +20,18 @@ online: <https://normanderwan.github.io/DocFxForUnity/>. It references both C# A
 ## Setup your documentation
 
 1. [Install DocFX](https://dotnet.github.io/docfx/tutorial/docfx_getting_started.html#2-use-docfx-as-a-command-line-tool).
-2. Copy the `Documentation/` folder and `DocFxForUnity.csproj` to your Unity project:
+2. Copy the `Documentation/` folder to your Unity project:
 
     ```diff
       .
       ├── Assets
-    + ├── DocFxForUnity.csproj
     + ├── Documentation
       ├── Package
       ├── ProjectSettings
       └── README.md
     ```
 
-    You can rename `DocFxForUnity.csproj` to match your project — just update the filename in `Documentation/docfx.json` under `metadata[0].src[0].files` accordingly.
+    You can rename `Documentation/DocFxForUnity.csproj` to match your project — just update the filename in `Documentation/docfx.json` under `metadata[0].src[0].files` accordingly.
 
 3. Edit the following properties in `Documentation/docfx.json`, keep the others as it is:
 
@@ -139,7 +138,7 @@ details.
 
 - DocFX outputs: `Warning:[ExtractMetadata]No project detected for extracting metadata.`
 
-    Solution: Make sure you copied `DocFxForUnity.csproj` (or your renamed version) to the root of your Unity project, and that the filename matches the entry in `Documentation/docfx.json` under `metadata[0].src[0].files`.
+    Solution: Make sure `DocFxForUnity.csproj` (or your renamed version) is inside the `Documentation/` folder, and that the filename matches the entry in `Documentation/docfx.json` under `metadata[0].src[0].files`.
 
 - DocFX outputs: `Warning:[ExtractMetadata]No metadata is generated for Assembly-CSharp,Assembly-CSharp-Editor.`
 
@@ -170,7 +169,7 @@ details.
 
 ## Advanced: `UNITY_MANAGED_PATH`
 
-By default, `DocFxForUnity.csproj` auto-detects the Unity managed DLLs from the standard Unity Hub installation directory. Set `UNITY_MANAGED_PATH` when you need to:
+By default, `Documentation/DocFxForUnity.csproj` auto-detects the Unity managed DLLs from the standard Unity Hub installation directory. Set `UNITY_MANAGED_PATH` when you need to:
 
 - Use a Unity version installed at a non-default location.
 - Pin to a specific version when multiple Unity versions are installed.